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SPECIFICATION forming part of Letters .Patent No. 705,048, dated July22, 1902. Application filed June 5,1901. Serial No. 63,237. (No model.)

To @ZZ whom it may concern,.-

Be it known that I, ALPHONSE Dn MAN, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Building-Walls, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

The invention relates to building-walls, and is more particularlydesigned. to be used in connection with that typeV of building having ametallic structural framework.

In the construction of buildings in large and crowded cities where thespace occupied is very valuable it is important to reduce in every waypossible the thickness of walls and partitions. structures permits of aconsiderable reduction in the thickness of the outer walls over thoseformed of solid masonry or brick; but as heretofore constructed thethickness of the wall is still considerably greater than is required ifnovel methods of construction are used.

It is the object of the present invention to obtain a construction ofwall in which the thickness will be reduced considerably from what theywere in previous methods of construction; and to this end the inventionconsists in the construction as hereinafter described and claimed. l

In the drawings, Figure l is a perspective view of a portion of theimproved buildingwall. Fig. 2 is a horizontal section thereof. Fig. 3 isan elevation of the metallic framework before the cementitious body islilled in; and Fig. 4. is a view similar to Fig. 2, showing a slightmodification.

The structural frame of the building is composed of a metallic skeletoncomprising the vertical members A and horizontal members B, joined toeach other in any suitable way. This structural framework when completedwill form a series of open spaces or panels C, which are usually filledwith masonry or brickwork. In order to protect the structural framework,the masonry or brickwork is usually extended on each side of it, and asthe vertical members of said framework are usually of greater diameterthan the cross members it is not practical and not The modern type ofsteel-frame` workmanlike to change the thickness of a brick wall tofollow all these irregularities of the metal skeleton. The thickness ofthe wall is thus increased in order to make it straight. With myimproved structure I diminish the thickness of the wall between thevertical members by filling the open spaces with a cementitious body,such as concrete, of suliicient thickness to withstand the lateralpressions to which the wall may be exposed. The

use of reinforced concrete admits a greater reduction than any othermason building material. To strengthen this concrete, as well as tosecurely connect the same to the structural framework, I arrange aseriesof small metallic tension members extending across the open spacebetween the main uprights and their horizontal connecting-pieces of theframework, which tension members are also embedded in the cementiticusbody. As shown in the drawings, the outside face of the wall is providedwith a series of horizontal tension members D, while the inner side ofthe wall is provided with a series of vertical tension members E. Thesemembers may be secured to the structural framework in any suitable way,and as they are firmly embedded in the wall and overlap the edges of thebeams and principal uprights the wall will be firmly held in place. Thewall as thus formed being comparatively thin and being formed of a moreor less porous substance needs to be protected from the penetration ofmoisture. This I accomplish by coating the ou ter face of the cementwith a waterproof coating of any suitable material, (indicated at F inthe drawings,) and then to give the proper finish a facing G of suitableplastic compound is placed outside of this coating. The plastic compoundcan also be made waterproof of itself, in which case the waterproofcoating can be dispensed with. Instead of this plastic compound anyoutside nnishing material can be used-such as terra-cotta, brick, orstone-using it as a veneer to give an outside desired effect. Thisveneer can be anchored to the cementitious wall by any suitableanchoring-clips built in it for that purpose or by driving projectingnails in the wall if it' is built of porous material, such as cinderconcrete.

The inside of the wall may be either di- IGC rectly finished or it maybe coated with plaster or other suitable finishing material.

As these walls are very thin, it will be necessary in climates where thedifference of outside and inside temperature isv great to apply on theinside of the Wall a coat of some insulating material, and besides afurring of hollow tile, to which the inside plastering can be applied.

The placing of the tension members near the surface of the cementitiousWall will impart the greatest element of strength thereto, as thegreatest tension strain is always eX- erted on the surface of the wall,and as there are tension members near the two surfaces the wall willresist lateral pressions as well from the inside as from the outside.

What I claim as my inventionvisn l. A building-wall comprising astructural framework composed of vertical and horizontal connectingmetallic beams leaving open panels between, small tension members eX*tending across said open panel upon opposite sides of said framework andoverlapping the latter and a cementitious filling embedding saidstructural and cross tension members.

2. A building-wall comprising a metallic structural framework composedof vertical columns and horizontal connectingbeams leaving open panelstherebetween, a series of small metallic tension members extendingacross said open spaces on the outside of said framework and overlappingsaid vertical columns, a similar series of metallic tensionmembersarranged in a different plane from the first series of tensionmembers and overlapping said horizontal beams and a cementitious bodyfilling said panel and embedding said tension members, said body beingeX- tended around said vertical columns and horizontal beams to embedthese also.

3. A building-wall comprising a metallic structural framework formingopen panels between the members thereof, small metallic tension membersextending across said open panels at the side of said framework andoverlapping the latter, a cementitious body filling said open panel andembedding said metallic tension members, and structural framework;coating of waterproof material outside of said cementitious filling anda facing of finishing material outside of said waterproof coating.

In testimony whereof I aflix my signature in presence of two witnesses.

ALPHONSE DE MAN.

Witnesses:

ALFRED OHLIGSBERG, J. MANHEIMER.

